The dangerous gaffe by Boris Johnson that has led to the jailed hostage Nazanin Zaghari-Ratcliffe facing an extra five years in a hellhole Iranian prison is inexcusable. The British Foreign Secretary is well known for his gaffes, but making an ill-advised and completely unfounded comment about the dual-nationality British-Iranian mum, while giving evidence to the foreign affairs select committee last week, must surely rank amongst his most serious blunders.